I have someone who is running Nero 5 in windows 98SE and it has stopped running, The message it shows when you click on the shortcut is: "The Nero executable file was modified. Maybe your pc is infected by a computer virus. We would recommend to use the latest antivirus software to check your pc. If no viruses are found, please do a full uninstall of Nero and reinstall from the original cd" I have run Norton anti-virus which was up to date and found nothing, I have reloaded Nero and also loaded version 6 but in all cases the same message appears. I have also ran Ad-aware which did not cure the problem. Does anyone have a suggestion as to what is causing the problem? This may be linked or not......but when you boot up the pc it throws up a windows registry checker message: " Windows encountered an error accessing the system registry. Windows will restart and repair the system registry for you" When you click on OK...the machine reboots but the message appears again no matter how many times you restart. Other than these problems the machine runs well, I may have considered windows to becoming corrupt had it been installed for a while but it was re-installed only a few months ago.